Brushmaking machine



Jul 20, 1943. CARLS N 2,324,481

BRUSH MAKING MACHINE Original Filed June 5, 1940 2 Sheets-Sheet 1 IN VENT OR.

' BY foiznf Carlaon,

A ATTORNEY.

July 20, 1943. .J. 1. CARLSON BRUSH MAKING MACHINE 2 Sheets-Sheet 2 Original Filed June 5, 1940 BY db hn/fCar yf u Patented July 20, 1943 BRUSHMAKING MACHINE John I. Carlson, Aurora, 111., assignor to Carlson Tool & Machine 00., Aurora llh, a partnership composed of John I. C

Carlson arlsonand Clifford D.

Original application June" 5,, '1940,' Serial No.-

338,859. Divided and this application February 20, 1941, Serial No. 379,807

Claims. (01. 300- 11') The invention relates generally to brush making machines and more particularly to the hole finder mechanism in such machines.

One object of the invention is to provide a hole finder mechanism of unique, light weight, but sturdy construction, capable of high speed operation.

Another object is to provide in a brush making machine a hole finder which is positively driven through its forward or down stroke and is spring returned. a

A further object is to provide such a positively driven hole finder with a limitedly yieldable drivingconnection.

Other objects and advantageswill become apparent from the following description, taken in connection with the accompanying drawings, in which: Y

Fig. l is a front elevational view of the top went, it is not'intended that the invention is to be limited thereby to the specific construction disclosed, but on the contrary it is intended to cover all modifications and alternative'constructions falling within the spirit and scope of the invention as defined by the appended claims. 1

This application is a division of my copending application for Brush making machine; Serial No. 338,859, filed June 5, 1940. i

The brush making machine, shown particularly in Fig. 1 for purposes of disclosure, is of the general type of brush making machine well known in the art. Generally 'such a machine comprises a bed or base ID from whichrise two upright frame members H and I2 connected at their upper free ends by a cross member I3. Disposed above the bed In area plurality of tables or supports I 4,- I5 and I5. These' tables are mounted upon and actuated by suitablemechanism, herein designated ll, which is operable to move the tables both transversely and longitudinally of the machine in an intermittentstep by step movement corresponding to the spacing of the tufting of the brush, as well as to tilt the tables to permit certain of the tufts to be placed at an angle to obtain the desired flare of the brush.

The table I4 is adapted to carry a blank wooden block shaped to form the brush back. Mounted on. the cross member l3 above the table M for action on'the brush back carried by the table is a drill head l8. This drill head is reciprocated and the drill I 9 carried thereby continuously rotated soas to bore holes in the block carried by the table M, in conformity with a predetermined pattern. The table I6 is adapted to support a brush back which has been formed with the necessary tuft receiving holes and disposed thereabove for cooperation therewith is a tuft supplying mechanism 20 and a staple forming and driving mechanism 21'. Like the drill head l8, the mechanisms '20 and 2| are intermittently operated in. order intermittently to secure tufts in holes of the brush backat the same time that corresponding holes are being drilled in a blank brush back carried onthe table l4.

The third table 15 is adapted to carry a template l5 having holes therein corresponding to the desired pattern that the brush is to have. Cooperating with this template is a hole finder 22 which is also .mounted on the cross member i3arid reciprocated in timed relation with the reciprocation of the drill head and staple driving mechanism to assure that the tables l4, l5 andlli, which are all interconnected, are accurately positioned.

Inasmuch as the various cams, eccentricsand likemechanism, for imparting to the table actuating and supporting mechanism H, the drill head; thejtuft supplying and staple driving mech anisms 20 and 2|, and the hole finder 22 their intermittent and interrelated and timed movements," are of more or less conventional construction and form no part of' this invention, the same have not b'een'disclosed herein. Suffice it to say; therefore, that the various mechanismsare driven preferably from an electric motor 23 through such cams and like mechanism mounted on a main cam shaft 24, coupled through the medium of aclutch 25 with a drive shaft 25, and also usually mounted on an auxiliary shaft (not shown) which is driven at a low R. P. M.

The hole finder 22, which constitutes the subject'matter of this divisional application, comprises a bracket bolted to the cross member l3-and providing vertically spaced bearings 3| and 32, in-which is reciprocable a finder rod 33. In order that the rod may be light weight, so as tobe capable of high speed reciprocation, it is preferably tubular, and at-its lower end carries a tip 34 which is threadedly received in the end of the rod 33 and secured by a nut 35. The tip 34 is thus adjustable to permit compensation for high or low settings of the table l5.

To enhance the operation of the hole finder, the rod 33 is positively driven through its forward or downward stroke, and is actuated through its return stroke by spring means. In this manner the hole finding operation of the hole finder is more positive and thereby assures better alinement of the tables and greater rigidity of the tables during the boring and tufting operations. This positive forward stroke of the finder rod 33 is imparted by a cam 36, fixed on the shaft 24, through the medium of a lever 31 pivotally mounted intermediate its ends on a bracket 38 secured on the top of the cross member I3. At one end the lever 31 carries a cam follower 39, while at its other end it is bifurcated and carries pins 40 (see Figs. 1 and 3) which engage with a collar 4| surrounding the upper end of the rod 33. The cam follower 39 is retained in contact with the cam 36 by means of a tension spring 52 connected at one end to the lever 31 intermediate the pivot point and the follower 39, and at the other end to a bracket 43 projecting laterally from the bracket 30. It will be apparent that, in addition to, or as an incident to retaining the cam follower 39 in contact with the cam 36, the spring 42 serves to effect the return stroke of the finder rod 33.

While the lever 31, cam 36, and spring 42 are so arranged that the lever 31 is positively driven during the down stroke of the rod and spring returned, a limited, yieldable driving connection is interposed between the rod 33 and the lever 31 to prevent injury to the machine, should the tip 34 fail to enter a hole in the template IS. TO that end the collar 4| is mounted for limited movement longitudinally of the rod 33. I Such limited movement is effected by forming the rod 33 with diametrically opposite slots 44 extending longitudinally of the rod through which a pin 45 of the collar 4| projects (see Figs. 2 and 3). Within the tubular rod 33 is a compression spring 46 bearing at one end against the pin 45 and at the other end against a pin 41 rigidly fixed in the rod diametrically thereof. Preferably the rod is provided with oil holes 48 through which lubricant may be supplied to the bearings 3| and 32 by placing lubricant within the tubular rod 33.

It is believed apparent from the foregoing that I have provided a hole finder greatly enhanced in operation and construction over prior art devices. Constructed in the manner disclosed, the hole finder is light weight, so as to be capable of high speed reciprocations and at the same time has sufiicient strength to withstand the strains to which a mechanism of this character is submitted. More important, however, is the unique arrangement whereby the finder rod is positively driven during its forward or operative stroke, while at the same time injury which might result from such a positive forward stroke, should the hole finder fail to enter a hole in the template, is precluded against by the limitedly yieldable driving connection between the lever and the rod proper. This positive operation assures more rapid and more accurately timed movement of the hole finder rod and, as previously stated, also renders the rod more effective in accurately positioning the tables and in retaining the tables rigid and properly positioned during the drilling and tufting operations.

I claim as my invention:

In a brush making machine, a first table for supporting a blank brush back to be drilled, a second table for supporting a drilled brush back to be tufted, and a third table supporting a multiple recessed master template, said tables all being interconnected, a hole finder mechanism adapted .to cooperate with the template on said third table comprising a support, a hole finder rod having a tapered operative end reciprocably mounted in said support, an actuating lever for said rod, a cam for positively driving said lever to effect the operative, template engaging stroke of said rod for forcibly inserting said tapered end into a recess in said template to position positively said interconnected tables, and a spring for retaining said lever in engagement with said cam and for effecting the return stroke of said rod.

2. In a brush making machine, a table Supporting a master template, a hole finder mechanism adapted to cooperate with the template on said table comprising a support, a hole finder rod reciprocably mounted in said support, an actuating lever for said rod, a cam for positively driving said lever to effect the operative template engaging stroke of said rod, a spring for retaining said lever in engagement with said cam and foreffecting the return stroke of said rod, and a limitedly yieldable driving connection between said lever and said rod including means positive ly limiting the extent of relative movement between said lever and said rod.

3. In a brush making machine, a hole finder mechanism comprising a support providing a bearing, a rod reciprocable in said support, a le-' ver for reciprocating said rod, and a yieldable driving connection between said lever and rod, said yieldable driving connection comprising means mounted on said rodfor limited movement longitudinally thereof and engaged by said lever, a compression spring interposed between said means and said rod, and means independent of said spring positively limiting the extent of movement of said first mentioned means in either direction longitudinally of said rod.

4. In a brush making machine, a hole finder comprising a support providing a bearing, a hollow rod reciprocable in said bearing, a lever for reciprocating said rod, a collar means engaged by said lever surrounding said rod and mounted thereon for limited movement longitudinally thereof, and a compression spring within said rod bearing at one end against said collar means and at the other end bearing against means rigid with said rod. g

5. In a brush making machine, a hole finder comprising a support providing a bearing, a hollow rod reciprocable in said bearing, a collar loosely surrounding said rod for movement longitudinally thereof, a lever for reciprocating said rod having a bifurcated end straddling said collar and engaging the same to impart movement thereto, means for limiting the movement of said collar relative to said rod comprising a pair of elongated diametrically oppositely disposed slots formed in said rod and a pin secured at its ends in said collar and extending through the slots in said rod, and a compression spring within said rod bearing at one end against said pin and at the other end bearing against means ri id with said rod.

JOHN I. CARLSON. 

